The tools provided by Yuki Igarashi rely on algorithms that transform 3d-shapes into sewing or knitting patterns. While Teddy and its successors are tools for shape creation each tool has a sister project dedicated to shape conversion.

In the paper “Knitting a 3D Model” the Igarashis describe a technique to convert 3d shapes to knitting patterns, which is quite similar to the one used by Hinke Osinga when turning the surface of the Lorenz Manifold into crochet instructions back in 2002.

Note that the circular knitting diagrams created by these algorithms are quite common in japanese Amigurumi and can be used for knitting and crochet alike.